tl;dr: join #hatstack on irc.freenode.net
If you're looking for an easy way to ask a question, you can visit this url https://kiwiirc.com/client/irc.freenode.net#hatstack. Be aware that this method does not show chat history.
If you do want persistent chat history, follow these steps!
Generate an SSH keypair:
Send your SSH key to firstname.lastname@example.org. Or poke someone from Hatstack.
When your account is created, you can connect to the server.
Connect to the server by SSH:
Linux/OS X: ssh email@example.com
Outdated! We moved to freenode
We are going to use the irsii client.
If you are not on the server now, install the package via your favorite package manager.
You have to have a unix shell in front of you for this to work.\\
/NETWORK ADD -nick NickName -user NickName -realname YourName smurfnet
/SERVER ADD -auto -network smurfnet bofh.nl.smurfnet.ch
/CHANNEL ADD -auto #hatstack smurfnet
Further information http://www.linux.org/threads/irssi-for-beginners.4181/ and google
'ctrl+a d' to put the screen in the background (This is what you usualy want to do)
'exit' to close the screen. This will also terminate irssi if it's running in this shell
ssh firstname.lastname@example.org (or via putty)
'screen -r' resumes your session